Update LatinIME native Makefile for gesture code

Also, a small clean up in the proguard.flags file

Change-Id: I860034c51a2abf448f7ecc250ed35687b1f1dd82

java/proguard.flags

@@ -3,10 +3,6 @@
   <init>(...);
 }
 
--keep class com.android.inputmethod.latin.Flag {
-  *;
-}
-
 -keep class com.android.inputmethod.keyboard.ProximityInfo {
   <init>(com.android.inputmethod.keyboard.ProximityInfo);
 }

native/jni/Android.mk

@@ -24,11 +24,10 @@ FLAG_DO_PROFILE ?= false
 include $(CLEAR_VARS)
 
 LATIN_IME_SRC_DIR := src
+LATIN_IME_SRC_FULLPATH_DIR := $(LOCAL_PATH)/$(LATIN_IME_SRC_DIR)
 
-LOCAL_C_INCLUDES += $(LOCAL_PATH)/$(LATIN_IME_SRC_DIR)
-LOCAL_C_INCLUDES += $(LOCAL_PATH)/$(LATIN_IME_SRC_DIR)/gesture
-LOCAL_C_INCLUDES += $(LOCAL_PATH)/$(LATIN_IME_SRC_DIR)/gesture/impl
-LOCAL_C_INCLUDES += $(LOCAL_PATH)/$(LATIN_IME_SRC_DIR)/gesture/impl/header
+LOCAL_C_INCLUDES += $(LATIN_IME_SRC_FULLPATH_DIR) \
+    $(addprefix $(LATIN_IME_SRC_FULLPATH_DIR)/, gesture gesture/impl)
 
 LOCAL_CFLAGS += -Werror -Wall
 
@@ -51,11 +50,7 @@ LATIN_IME_CORE_SRC_FILES := \
     proximity_info.cpp \
     proximity_info_state.cpp \
     unigram_dictionary.cpp \
-    gesture/build_check.cpp \
-    gesture/impl/gesture_decoder_impl.cpp \
-    gesture/impl/incremental_decoder_impl.cpp \
-    gesture/impl/token_beam_impl.cpp \
-    gesture/impl/token_impl.cpp
+    gesture/build_check.cpp
 
 LOCAL_SRC_FILES := \
     $(LATIN_IME_JNI_SRC_FILES) \
@@ -81,12 +76,50 @@ LOCAL_C_INCLUDES += external/stlport/stlport bionic
 endif
 
 include $(BUILD_STATIC_LIBRARY)
+######################################
+include $(CLEAR_VARS)
+
+LOCAL_C_INCLUDES += $(LATIN_IME_SRC_FULLPATH_DIR) \
+    $(addprefix $(LATIN_IME_SRC_FULLPATH_DIR)/, gesture gesture/impl gesture/impl/header)
 
+LOCAL_CFLAGS += -Werror -Wall
+
+# To suppress compiler warnings for unused variables/functions used for debug features etc.
+LOCAL_CFLAGS += -Wno-unused-parameter -Wno-unused-function
+
+LATIN_IME_GESTURE_IMPL_SRC_FILES := \
+    gesture/impl/gesture_decoder_impl.cpp \
+    gesture/impl/incremental_decoder_impl.cpp \
+    gesture/impl/token_beam_impl.cpp \
+    gesture/impl/token_impl.cpp
+
+LOCAL_SRC_FILES := $(addprefix $(LATIN_IME_SRC_DIR)/,$(LATIN_IME_GESTURE_IMPL_SRC_FILES))
+
+ifeq ($(FLAG_DO_PROFILE), true)
+    $(warning Making profiling version of native library)
+    LOCAL_CFLAGS += -DFLAG_DO_PROFILE
+else # FLAG_DO_PROFILE
+ifeq ($(FLAG_DBG), true)
+    $(warning Making debug version of native library)
+    LOCAL_CFLAGS += -DFLAG_DBG
+endif # FLAG_DBG
+endif # FLAG_DO_PROFILE
+
+LOCAL_MODULE := libjni_latinime_gesture_impl_static
+LOCAL_MODULE_TAGS := optional
+
+ifdef HISTORICAL_NDK_VERSIONS_ROOT # In the platform build system
+include external/stlport/libstlport.mk
+else # In the NDK build system
+LOCAL_C_INCLUDES += external/stlport/stlport bionic
+endif
+
+include $(BUILD_STATIC_LIBRARY)
 ######################################
 include $(CLEAR_VARS)
 
 # All code in LOCAL_WHOLE_STATIC_LIBRARIES will be built into this shared library.
-LOCAL_WHOLE_STATIC_LIBRARIES := libjni_latinime_static
+LOCAL_WHOLE_STATIC_LIBRARIES := libjni_latinime_static libjni_latinime_gesture_impl_static
 
 ifdef HISTORICAL_NDK_VERSIONS_ROOT # In the platform build system
 LOCAL_SHARED_LIBRARIES := libstlport
@@ -116,5 +149,6 @@ include $(BUILD_SHARED_LIBRARY)
 #################### Clean up the tmp vars
 LATIN_IME_CORE_SRC_FILES :=
 LATIN_IME_JNI_SRC_FILES :=
+LATIN_IME_GESTURE_IMPL_SRC_FILES :=
 LATIN_IME_SRC_DIR :=
-TARGETING_UNBUNDLED_FROYO :=
+LATIN_IME_SRC_FULLPATH_DIR :=